[h323plus] Using LibreSSL instead of OpenSSL with GnuGk / H323Plus / PTLib

Hi,

with the bugs recently found in OpenSSL, there is some concern how many more issues still lurk in the old and crufty OpenSSL code. There is a great effort by some OpenBSD developers to fork OpenSSL into "LibreSSL" (www.libressl.org) and clean up the code while keeping the public interface stable.

I did a quick check and can report that GnuGk / H323Plus / PTLib compile well with LibreSSL instead of OpenSSL. All I had to do was provide a pkg-config file. So now we have a choice which library to use.

I used LibreSSL Portable 2.0.3 for my test.

Another interesting project would be to use GnuTLS as a replacement, but thats going to require a number of code changes on our side.

Regards, Jan